Advertisements
Advertisements
प्रश्न
Distinguish between Nonchordata and Chordata.
Advertisements
उत्तर
| Nonchordates | Chordates |
| 1. Notochord is absent in them | 1. Notochord is present in them at some of their developmental stage. |
| 2. Their central nervous system is solid and ventral | 2. Their central nervous system is hollow and dorsal. |
| 3. Heart, if present in them, is dorsal in position. | 3. Heart is always present and it is ventral in position. |
| 4. Their circulatory system is of open or closed type. | 4. Their circulatory system is of closed type. |
| 5. Respiratory pigment, the haemoglobin, if present, is dissolved in plasma of blood. | 5. Haemoglobin is present in their red blood cells or corpuscles. |
| 6. Pharyngeal gill slits are absent in them. | 6. Pharyngeal gill-slits are present in them. |
| 7. They contain anus at posterior end of body, so post-anal tail is not present. | 7. Their anus is not located at posterior tip of body, so contain a post-anal tail. |
संबंधित प्रश्न
How are the criteria for deciding divisions in plants different from the criteria for deciding the subgroups among animals?
Write one difference between the following pair:
Invertebrates and Vertebrates
Write down four main characters of Platyhelminthes. Give two examples.
Main characteristics of Nematoda:
Write down four characters of Chondrichtyes. Give two examples.
Write down four characters of mammals. Give two examples.
Distinguish between polyp and medusa.
Write down four general characters of cnidarians (coelenterates). Give two examples.
Explain the general characters of phylum Arthropoda. Give one example of following classes
(i) Crustacea;
(ii) Myriapoda;
(iii) Insecta;
(iv) Arachnida.
Rewrite the following scientific names correctly.
ficus religiosa (peepal), zea Mays (maize) and Bombyx Mori (silk moth).
What are the group names of the following categories of animals?
Animals with a backbone _____________
Given below is an animal followed by three terms or features. Underline the term which does not match with the animal.
Butterfly- Insecta, Invertebrata, Mollusca
Name any two animals which possess compound eyes.
Fill in the blanks:
Nephridia are the excretory organs of ______.
Choose the correct answer: Jelly-fish is classified in the phylum
Choose the correct answer: The animal of phylum mollusca is
Choose the correct answer: Which of the following is not a helminth parasite?
Write the binomial name of
- Human being
- Paddy
Select the INCORRECT statement from the following.
Consider the following statements:
- Annelids are true coelomates
- Poriferans are pseudocoelomates
- Aschelminthes are acoelomates
- Platyhelminthes are pseudocoelomates
Choose the correct answer from the options given below:
